Demountable rim for automobile-tires.



W. N. BOOTH.

DEMOUNTABLE RIM FOR AUTOMOBILE TIRES.

APPLICATION FILED APR.12, 1909.

6, Patented Apr. 12, 1910.

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UNITED srAirEs PA E orrron.

WILLIAM N. BOOTH, or cL'EvEL'ANn,-oHIo.fi-=

DEMOUNTABLE RIM'FOR AUTOMOBILE-TIRES. Y

Specificationof LettersPatent. Pat nted Apr.- 12,1910.

Application filed April 12, 1909, Serial No. 489,482

To all whoad itxrhay concern Be it known that I, \VILLIAM N. Boom,

a citizen; of the United States, and resident of Cleveland, in the county of Guyahoga and p ovements in Demountable Rims for Automobile-Tires, of which I here by declare the' following to be a full, clear, and exact description, such as will enable others skilled in the art to which it appertai'ns to make and use, the same.

This invention. relates to improvements in demountable rims for" automobiles wheels, and the objects of the invention are to pro- ,vide simple and efficient --instrumentalities for securely fastening the demountable rim to a fixed rim on the felly, and the invention also has reference to a simple and efiicient device for attaching the tire to the demountable rim.

I One of-the important features of the mechanism is the positive locking means employed for securing'the demountable rim to the fixed rim which is of such character that it can not work looseor permit a rattling noise.

Furtherobjects are to provide devices for these purposes which can readily be understood and operated by ordinary individuals or automobile owners, so that an injury to a tire while on the road will not prevent the continuation of the trip. The'demountable rim and tire fastening devices are also so arranged that the rim can be attached to a spare inflated tire, and can be carr1ed.'w1th the machine and 'be ready .for use at any moment.

The invention comprises, the employment inconnectionf 1th a fixed rim having 211L111- clined -face,j"o a-demountable rim preferably provided. with a correspondingly inclined inner annular surface adapted to engage closely the inclined surface of the fixed rim, and instrumentalities for forcing the demountable rim over the fixed rim and for locking the parts securely together; In this manner the wedging surfaces are maintained in' such close engagement that-they can not become loosened, except by forcing them apart by reversing the movements of the mechanical devices'employed to force them together.

ave invented certain new" The invention further consists in the worm; screw and gear mechanism employed for this purpose, n con unct1on with en gaging members in the 'demountable rim.

And an important feature ofthe invention is shown in the rotatable locking devices mounted in one of the clencher holding rings, and the annular groove in the dcmourrtable rim in which said locking devices are adapted to enter, i :The invention is hereinafter more fully described, shown in the accompanying drawings, and specifically pointed out in the claims.

In the accompanying drawings, -Figure 1 is a side elevation of the device shown attached to the wheel; Fig. 2 is a transverse sectionof the wheel and fellyshowing the fixed rim, the demountable rim, and one of the locking devices for the detachable ring which clamp thejclencher tire in place; Fig. 3 is a. similar section through the worm and gear locking device for the demouutable rim F 1g. 4 is a longitudinal section of the same; Fig. 5 is a plan view of the worm and gear locking device, with the cover of' The demountable rim is slidingly V rim is of such a character'that it is self locking, and the demountable rim and fixed rim cannot be separated except through "the releasing agency of the same device.

The device comprisesa worm screw 6, in-

termediately placed between and engaging the duplicate form wheels 7, 7 These parts are inclosed in a case 8,.which is secured in a recess 9, formedin the felly and fixed rim of thewheel, so that the worm wheelswill be located inside of the circle of the demount 'able'rim. 8 isthe cover for this case. Lugs 10,10 depending from the demountable rim are respectively engaged by the worm wheels -7, 7 which of course turnin thesame direction at their edges farthest from the screw and transversely of the fixed mm. .The worm screwextends through the case at 11,

and is squared for the use of a wrench to .turn it with, and when turne'dthe ,flat surfaces 12, 12 and 12, 12' of the worm-wheels engage the lugs' alternately and move them in one direction or the other to force the de- 'mountable rim on or oil from the fixed rim as desired. Viherever placed it will be impossible' to move the demountable rim unless the worm screw is operated by hand except in the middle position shown in Fig. 5-where' the gear is not in engagement with the lugs,

As many of'these locking devices can em 'loyed and spaced about the rim as may be esired, thus preventing warping or twist- 4 .ing of'the rim atany point. The lugs also the'recesses 9, 9 spaced regularly therein and corresponding recesses are preferably formed in the felly.

The locking device for the'clencher tire is clearly shown in-,Fig. 2 where the demountable rim is provided upon itsperiphery with the outer sliding 'clencher rin ,13, and with -the inner ring 14, which can e either fixed or movable at pleasure. In the outer ring- 13 are secured at intervals .=the disks 15, 15 which are adapted to engage with the annular groove 16 in the outer edge of the-demountable rim. These disks have a flat side 17 which permits of releasingthem from the groove 16, and they can be turned to en-' gage the groove by means of the projecting.

square heads 18. A plug 19 secures each one in-place.

I have mentioned the inclined surfaces as wedging tightly together, and they also serve to prevent the demountable rim from sliding completely over the fixed rim, at the near side. Any other means for preventing this, action however are within the scope of the claims.

Having described the invention what I claim as new and desire to secure by'L'etters Patent is: i y

' 1. In combination,a fixed rim, ademountable rim adapted to fit closely,thereon, said parts having inclined engagingsurfaces, a pair of lugs on said demountable rim, a

worm and wheel locking device intermediate between said pair of lugs and mounted in said fixed rim, and adapted andarrangedto engage said pair of lugstofor cesaid demountable rim on-and off from said fixed rim. I r

2. In combination, a fixed" r im,-a demountable rim, adapted to be sleeved thereon, said members hav ng inclined meeting faces, a lug extending from the demountable rim, and a worm and wheel device said fixed rim adapted to engage said lug, to force said demountable rim upon saidfixed rim and to release it therefro i 3. In combination, a fixed rim, provided with ,a series of recesses, ademountable rim,

adapted to be sleeved thereon, a pair 0 spacedlugs extending from said demountable. run into each of said-recesses and adapted to-en'gage the end walls thereof,-

and a worm and wheel device in each re-* cess, adapted to engage simultaneousl said pair of to force said demountab e rim transvers y -out-and ofifroln said fixed rim. :4. In combinatiom a fixed rim, provided with a series of spaced recesses, a demountable rim adapted to be'sleeved thereover, airs of lu s on the demountable rim space apart and adapted to enter said re cesses, a worm screw centrally mounted between saidlugs in each recess, duplicateworm wheels engaging said worm screw on two sides, and outer faces for said wheels adapted to engage said in s, whereby when said worm screw is turne in one direction said demountable rim can be forced on the fixed rim, and when turned in another di i ection said demountable rim can be forced off from'the fixed rim.

' .5. In combination, a fixed rim,a demountable rim thereon, a sliding clencher ring,

said rim having an' annular groove in its outer face, arseries of cams in said sliding ring, each cam adapted to engage the side of said groove or alternately to be disengaged therefrom, said sliding ring provided with, threaded openings at intervals in its outer edge, a threaded plug in each 0 ening, and a cam in each opening ada te to be secured in place by said plug, sai cam provideid with a fiat face and'with a projecting hea 6. The combination wi'th'a demountable I rim, provided with an annular groove in its outer face, of a ring slidingly movable upon said rim, and provided"w ith'a-. series of 0 enins,.a plug in each opening, a rotatable CllSk pivoted in each opening and adapted to engage with the side of said groove, each disk provided'with a flat ed e, said plug servingas a securing means or each disk in its respective opening, and means for retating said disks to alternately engage and disengage with the sides of said grooves.

7. The combination with a fixed rim, of a worm screw and worm wheel, mounted thereon, said worm wheel havin engaging faces, a demountable rimsle'eve over said fixed rim, and :1. lug upon said demountable rim, said lug adapted to be engaged alternately by said faces insai'd worm gear to advance said demoimtable rim upon said engaged by said wheels to move said de- 10 fixed-rim and to remove -it therefrom," sub-o mountable rim 'on and off from saidfixed stantially as described. rim. "f

8. The combination with a fixed rim', of In testimony whereof, I hereunto set my 7 a worm screw and worm wheels mounted hand this 8th day of April 1909.

' in theperiphery thereof, and spaced apart WILLIAM N. BOOTH.

thefeon, a demountable rimadapted'to be In presence of sleeved over said fixed rim, and spaced lugs Wm M; Mormon,

upon said demounta'ble rim; adapted to be G110. S. COLE. 

